"Finally they said I could come home after they got it under control but ... hey almost came on 3/27- happy anniversary in deed!!!" she added. "We have a few more weeks 2 go but- wow!!!: ) #soreadyallready!"

Carey celebrated her 42nd birthday on Sunday. She and Cannon will mark their two-year wedding anniversary on April 30. The twins will be the couple's first children together.

Carey later posted a photo of what appeared to be her belly, which sported a colorful, painted picture of a butterfly, one of her favorite symbols and the name of her sixth studio album, which came out in 1997. The words "Dem Babies" were painted above it.